function OnlyAlphaNumeric() {
		//returns true is sString is alphanumeric or blank/apostrophy/oblique, false otherwise
		if (event.keyCode == 13) {return;}

		var sLetter;
		sLetter = event.keyCode;
		if ((sLetter >= 48 && sLetter <= 57) || (sLetter >= 65 && sLetter <= 90) || (sLetter >= 97 && sLetter <= 122) ||(sLetter == 39) ||(sLetter == 38) ||(sLetter == 32) || (sLetter == 37) ||(sLetter == 45)  ||(sLetter == 47)  ||(sLetter == 92)) {
				return;}
		else {
			event.keyCode = 0;		
				}
	}
	
	function OnlyAlphaNumericAndApp() {
		//returns true is sString is alphanumeric or blank/apostrophy/oblique, false otherwise
		if (event.keyCode == 13) {return;}
		if (event.keyCode == 39) {
			event.keyCode =0;
			return;}
			
		var sLetter;
		sLetter = event.keyCode;
		if ( (sLetter >= 48 && sLetter <= 57) || (sLetter >= 65 && sLetter <= 90) || (sLetter >= 97 && sLetter <= 122) ||(sLetter == 39) ||(sLetter == 38) ||(sLetter == 32) || (sLetter == 37) ||(sLetter == 45)  ||(sLetter == 47)  ||(sLetter == 92 )) {
				return;}
		else {
			event.keyCode = 0;		
				}
	}
	
	function FilterQueryString(strTemp) { 
		strTemp = strTemp.replace(/\<|\>|\"|\'|\%|\;|\(|\)|\&|\+|\-/g,""); 
		return strTemp;
	}