/*
  $Id: general.js 1739 2007-12-20 00:52:16Z hpdl $

  osCommerce, Open Source E-Commerce Solutions
  http://www.oscommerce.com

  Copyright (c) 2003 osCommerce

  Released under the GNU General Public License
*/

//
// MISC
//

function byId(e) {
	return(document.getElementById(e));
}
function byName(tag, name) {
	if (browserIE) {
		//var ieversion=new Number(RegExp.$1);
		return getElementsByNameIE(tag, name);
	} else {
		return document.getElementsByName(name);
	}
}
var agent=navigator.userAgent.toLowerCase();
var browserIPHONE = (agent.indexOf('iphone')!=-1);

var browserIE = /MSIE (\d+\.\d+);/.test(navigator.userAgent);

if (browserIE) var versionIE = new Number(RegExp.$1);

function getElementsByNameIE(tag, name) {
     
     var elem = document.getElementsByTagName(tag);
     var arr = new Array();
     for(i = 0,iarr = 0; i < elem.length; i++) {
          att = elem[i].getAttribute("name");
          if(att == name) {
               arr[iarr] = elem[i];
               iarr++;
          }
     }
     return arr;
}


//
// AJAX
//

function writePage(file, divname){
	
	var ajaxRequest;
	
	try{
		// Opera 8.0+, Firefox, Safari
		ajaxRequest = new XMLHttpRequest();
	} catch (e){
		// Internet Explorer Browsers
		try{
			ajaxRequest = new ActiveXObject("Msxml2.XMLHTTP");
		} catch (e) {
			try{
				ajaxRequest = new ActiveXObject("Microsoft.XMLHTTP");
			} catch (e){
				alert("Please enable Javascript support");
				return false;
			}
		}
	}
	ajaxRequest.onreadystatechange = function() {
		if (ajaxRequest.readyState == 4) {
			byId(divname).innerHTML = ajaxRequest.responseText;
		}
	};
	
	ajaxRequest.open("GET", file, true);
	ajaxRequest.send(null); 
}

function sendRequest(file, request, func){
	
	var ajaxRequest;
	
	try{
		// Opera 8.0+, Firefox, Safari
		ajaxRequest = new XMLHttpRequest();
	} catch (e){
		// Internet Explorer Browsers
		try{
			ajaxRequest = new ActiveXObject("Msxml2.XMLHTTP");
		} catch (e) {
			try{
				ajaxRequest = new ActiveXObject("Microsoft.XMLHTTP");
			} catch (e){
				alert("Please enable Javascript support");
				return false;
			}
		}
	}
	
	ajaxRequest.onreadystatechange = function() {
		handleRequest(ajaxRequest.readyState, ajaxRequest.responseText, func);
	};
	
	ajaxRequest.open("post", file, true);
	ajaxRequest.setRequestHeader("Content-Type", "application/x-www-form-urlencoded"); 
	ajaxRequest.send(request); 
}

function handleRequest(ready, text, func) {
	
	if (ready == 0) {
		// not initialized
	} else if (ready == 1) {
		// connection established
	} else if (ready == 2) {
		// request received
	} else if (ready == 3) {
		// answer in process
	} else if (ready == 4) {
		// finalized
		
		// Array that will contain the arguments passed by the script
		var list = new Array();
		// Array that will contain the actual content for every argument
		var result = new Array();
		
		var varList = text.split("&");
		var k=0;
		for (var i in varList) {
			var charPos = varList[i].indexOf("=");
			var key = varList[i].substr(0, charPos);
			var res = varList[i].substr(charPos+1);
			
			if (key.indexOf("_list") > -1) key = key.split("_list")[0];
			// List of keys
			list[k] = key;
			// List of values
			result[k] = res;
			k++;
		}
		var content = new Array();
		for (var i=0; i < list.length; i++) {
			// If every variable has a list of values then split them.
			if (result[i].indexOf("^") > -1) {
				var newList = result[i].split("^");
				var values = new Array();
				for (var j = 0; j < newList.length-1; j++) {
					values[j] = newList[j];
				}
				content[list[i]] = values;
			} else {
				content[list[i]] = result[i];
			}
		}
		if (func)
			func(content);
	}
	
}



function SetFocus(TargetFormName) {
  var target = 0;
  if (TargetFormName != "") {
    for (i=0; i<document.forms.length; i++) {
      if (document.forms[i].name == TargetFormName) {
        target = i;
        break;
      }
    }
  }

  var TargetForm = document.forms[target];
    
  for (i=0; i<TargetForm.length; i++) {
    if ( (TargetForm.elements[i].type != "image") && (TargetForm.elements[i].type != "hidden") && (TargetForm.elements[i].type != "reset") && (TargetForm.elements[i].type != "submit") ) {
      TargetForm.elements[i].focus();

      if ( (TargetForm.elements[i].type == "text") || (TargetForm.elements[i].type == "password") ) {
        TargetForm.elements[i].select();
      }

      break;
    }
  }
}

function RemoveFormatString(TargetElement, FormatString) {
  if (TargetElement.value == FormatString) {
    TargetElement.value = "";
  }

  TargetElement.select();
}

function CheckDateRange(from, to) {
  if (Date.parse(from.value) <= Date.parse(to.value)) {
    return true;
  } else {
    return false;
  }
}

function IsValidDate(DateToCheck, FormatString) {
  var strDateToCheck;
  var strDateToCheckArray;
  var strFormatArray;
  var strFormatString;
  var strDay;
  var strMonth;
  var strYear;
  var intday;
  var intMonth;
  var intYear;
  var intDateSeparatorIdx = -1;
  var intFormatSeparatorIdx = -1;
  var strSeparatorArray = new Array("-"," ","/",".");
  var strMonthArray = new Array("jan","feb","mar","apr","may","jun","jul","aug","sep","oct","nov","dec");
  var intDaysArray = new Array(31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31);

  strDateToCheck = DateToCheck.toLowerCase();
  strFormatString = FormatString.toLowerCase();
  
  if (strDateToCheck.length != strFormatString.length) {
    return false;
  }

  for (i=0; i<strSeparatorArray.length; i++) {
    if (strFormatString.indexOf(strSeparatorArray[i]) != -1) {
      intFormatSeparatorIdx = i;
      break;
    }
  }

  for (i=0; i<strSeparatorArray.length; i++) {
    if (strDateToCheck.indexOf(strSeparatorArray[i]) != -1) {
      intDateSeparatorIdx = i;
      break;
    }
  }

  if (intDateSeparatorIdx != intFormatSeparatorIdx) {
    return false;
  }

  if (intDateSeparatorIdx != -1) {
    strFormatArray = strFormatString.split(strSeparatorArray[intFormatSeparatorIdx]);
    if (strFormatArray.length != 3) {
      return false;
    }

    strDateToCheckArray = strDateToCheck.split(strSeparatorArray[intDateSeparatorIdx]);
    if (strDateToCheckArray.length != 3) {
      return false;
    }

    for (i=0; i<strFormatArray.length; i++) {
      if (strFormatArray[i] == 'mm' || strFormatArray[i] == 'mmm') {
        strMonth = strDateToCheckArray[i];
      }

      if (strFormatArray[i] == 'dd') {
        strDay = strDateToCheckArray[i];
      }

      if (strFormatArray[i] == 'yyyy') {
        strYear = strDateToCheckArray[i];
      }
    }
  } else {
    if (FormatString.length > 7) {
      if (strFormatString.indexOf('mmm') == -1) {
        strMonth = strDateToCheck.substring(strFormatString.indexOf('mm'), 2);
      } else {
        strMonth = strDateToCheck.substring(strFormatString.indexOf('mmm'), 3);
      }

      strDay = strDateToCheck.substring(strFormatString.indexOf('dd'), 2);
      strYear = strDateToCheck.substring(strFormatString.indexOf('yyyy'), 2);
    } else {
      return false;
    }
  }

  if (strYear.length != 4) {
    return false;
  }

  intday = parseInt(strDay, 10);
  if (isNaN(intday)) {
    return false;
  }
  if (intday < 1) {
    return false;
  }

  intMonth = parseInt(strMonth, 10);
  if (isNaN(intMonth)) {
    for (i=0; i<strMonthArray.length; i++) {
      if (strMonth == strMonthArray[i]) {
        intMonth = i+1;
        break;
      }
    }
    if (isNaN(intMonth)) {
      return false;
    }
  }
  if (intMonth > 12 || intMonth < 1) {
    return false;
  }

  intYear = parseInt(strYear, 10);
  if (isNaN(intYear)) {
    return false;
  }
  if (IsLeapYear(intYear) == true) {
    intDaysArray[1] = 29;
  }

  if (intday > intDaysArray[intMonth - 1]) {
    return false;
  }
  
  return true;
}

function IsLeapYear(intYear) {
  if (intYear % 100 == 0) {
    if (intYear % 400 == 0) {
      return true;
    }
  } else {
    if ((intYear % 4) == 0) {
      return true;
    }
  }

  return false;
}