//Delcare variable for browser
var isNav, isIE;
var ieall="";
var sty="";
var imageext	=	new Array(".gif",".jpg",".jpeg")

//Browser checking
if(parseInt(navigator.appVersion)>=4)
   {
   if(navigator.appName=="Netscape") {
      isNav=true;
   }
   else {
      isIE=true;
      var ieall="all.";
	  var sty=".style";
	  }
   }

//function for Empty Checking with alert message
function IsEmpty(objWord,strErrorMesg) {
        var blnIsEmpty = true;	
	var blnObjectPrm=false;
	var i=0;	
	var strWord='';
	var objThis;

	if (isIE)
		blnObjectPrm = (typeof(objWord)=='object'?true:false) ; 
	else
		blnObjectPrm = true;

	if (blnObjectPrm) {
		objThis = objWord;
		strWord=objWord.value;
	}
	else {
		if (objWord.substring(0,8)=='document') {
			objThis =eval(objWord); 
			strWord=objThis.value;
			blnObjectPrm = true; 
		}
		else
			strWord=objWord;
	}

	while(i<strWord.length && blnIsEmpty) {
		if (strWord.charAt(i)!=' ')
			blnIsEmpty=false;
		i++;
  	}
	if (blnIsEmpty && strErrorMesg!='') {
		alert(strErrorMesg);
		if (blnObjectPrm) {
			//objThis.select();
			objThis.focus();
		}
	}
	return blnIsEmpty;
}



//function for Positive and Negative numeric Checking
function IsNumeric(objNumber,strErrorMesg) {
	var blnIsNumeric = true;	
	var blnObjectPrm=false;
	var i=0;	
	var strNumber='';
	var objThis;
	var digits="0123456789.-,";
	var temp;

	if (isIE)
		blnObjectPrm = (typeof(objNumber)=='object'?true:false) ; 

	if (blnObjectPrm) {
		objThis = objNumber;
		strNumber=objNumber.value;
	}
	else {
		if (objNumber.substring(0,8)=='document') {
			objThis =eval(objNumber); 
			strNumber=objThis.value;
			blnObjectPrm = true; 
		}
		else
			strNumber=objNumber;
	}	

	for (var i=0;i<strNumber.length;i++) {
		temp=strNumber.substring(i,i+1)
		if (digits.indexOf(temp)==-1) {
			blnIsNumeric=false;
	    }
	}
	if (!blnIsNumeric && strErrorMesg!='') {
		alert(strErrorMesg);
		if (blnObjectPrm) { 
			//objThis.select(); 
			objThis.focus(); 		
		}
	}
	return blnIsNumeric;
}


function isValidEmail(s)
{
	var regEmail = new RegExp(/\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*/);
	return regEmail.test(s);
}