<!--

function trim(varString){

	var strTemp = varString.toString();
		
	if(strTemp.indexOf(" ") >= 0){
	
		// Left Trim
		for (i=0; i < strTemp.length; i++) {
			if(strTemp.charAt(i) == " "){
				strTemp = strTemp.substring(i + 1);
			}
			else{
				break
			}
		}
		
		// Right Trim
		for (i=strTemp.length - 1;  i >= 0; i--) {
			if(strTemp.charAt(i) == " "){
				strTemp = strTemp.substring(0, i);
			}
			else{
				break
			}
		}
	}
	
	return strTemp
}

function IsValidEmail(email) {

	invalidChars = " /:,;"

	if (email == "") {
	return false
	}

	for (i=0; i<invalidChars.length; i++) {
	badChar = invalidChars.charAt(i)
	if (email.indexOf(badChar,0) > -1) {
	return false
	}
}	
	atPos = email.indexOf("@",1)
	if (atPos == -1) {
	return false
	}

	periodPos = email.indexOf(".",atPos)
	if (periodPos == -1) {
	return false
	}

	if (periodPos+3 > email.length) {
	return false
	}

	return true
	}

function SQLInjection(strText) {

	var	arrBadChars = new Array("&", "'", "\"", "+", ",", "(", ")");

	for (i=0; i < arrBadChars.length; i++) {
		if (strText.indexOf(arrBadChars[i], 0) > -1) {
			return true
			break;
		}
	}
	return false
}

/* 
	IsNumeric() Function
	Imitates the VB function of the same name by returning true if the value is numeric
	and false if it is not.
	This function is more user friendly than the JavaScript isNan() function because it allows for 
	decimal points. 
*/
function IsNumeric(varValue) {
	
	varValue = varValue.toString();

	if (varValue.length == 0){
		return false;
	}
	
	for (var n = 0; n < varValue.length; n++){
	
		if (isNaN(varValue.substring(n, n+1)) && (varValue.substring(n, n+1) != "."))
			return false;
		}
		
	return true;
}

function OpenWindow(strURL){
	var intHeight = screen.availHeight - 200;
	var intX = (screen.availWidth / 2) - 300;
		
	window.open(strURL,"new_window","height="+ intHeight +",width=600,left="+ intX +",top=100,toolbar=0,scrollbars=1");
}

function IsDate(strDate){

	var blnResult = true;

	// check that the string is at least 6 characters long ie. 1/1/03.		
	if (strDate.length < 6){ 
		blnResult = false;
	}
	else{
		// check that there are 3 values separated by forward slashes.
		var arrDate = strDate.split("/")
	
		if(arrDate.length != 3){ 
			blnResult = false;
		}
		else{
			// check that each of the 3 values are numeric
			for (i = 0; i <= 2; i++){
				if(isNaN(arrDate[i])){
					blnResult = false;
				}
				else{
					/*
					 check that the month (array element 1) is between 1 and 12
					 and the days (array element 0) do not exceed the number of days in the month
					 */
					if (i == 1) {	// Jan, Mar, May, July, Aug, Oct, Dec
						if (arrDate[i] == 1 || arrDate[i] == 3 || arrDate[i] == 5 || arrDate[i] == 7 ||
							arrDate[i] == 8 || arrDate[i] == 10 || arrDate[i] == 12){
							if(arrDate[0] < 1 || arrDate[0] > 31){
								blnResult = false;
							}
						}			// Apr, Jun, Sep, Nov
						else if(arrDate[i] == 4 || arrDate[i] == 6 || arrDate[i] == 9 || arrDate[i] == 11){
								if(arrDate[0] < 1 || arrDate[0] > 30){
									blnResult = false;
								}
						}
						else if (arrDate[i] == 2){ 		// Feb
							
							if (arrDate[2] % 4 == 0){ 	// leap year
								if(arrDate[0] < 1 || arrDate[0] > 29){
									blnResult = false;
								}
							}
							else{ 						// non leap year
								if(arrDate[0] < 1 || arrDate[0] > 28){
									blnResult = false;
								}
							}
						}
						else{
							blnResult = false;
						}
					}
				}
			}
		}
	}
	return blnResult;
}

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