function emailvalidation(entered, alertbox){
	with (entered){
		apos=value.indexOf("@"); 
		dotpos=value.lastIndexOf(".");
		lastpos=value.length-1;
		if (apos<1 || dotpos-apos<2 || lastpos-dotpos>3 || lastpos-dotpos<2) 
			{if (alertbox) {alert(alertbox);} return false;}
		else {return true;}
	}
}

function valuevalidation(entered, min, max, alertbox, datatype){
	with (entered){
		checkvalue=parseFloat(value);
		if (datatype){	
			smalldatatype=datatype.toLowerCase();
			if (smalldatatype.charAt(0)=="i") {checkvalue=parseInt(value)};
		}

		if ((parseFloat(min)==min && checkvalue<min) || (parseFloat(max)==max && checkvalue>max) || value!=checkvalue)
		{if (alertbox!="") {alert(alertbox);} return false;}
		else {return true;}
	}
}


function digitvalidation(entered, min, max, alertbox, datatype){
	with (entered){
		checkvalue=parseFloat(value);
		if (datatype){
			smalldatatype=datatype.toLowerCase();
			if (smalldatatype.charAt(0)=="i") {
				checkvalue=parseInt(value); 
				if (value.indexOf(".")!=-1) 
					{checkvalue=checkvalue+1}
			};
		}
		if ((parseFloat(min)==min && value.length<min) || (parseFloat(max)==max && value.length>max) || value!=checkvalue)
			{if (alertbox!="") {alert(alertbox);} return false;}
		else {return true;}
	}
}


function emptyvalidation(entered, alertbox){
	with (entered){
		if (value==null || value=="")
			{if (alertbox!="") {alert(alertbox);} return false;}
		else {return true;}
	}
}