function notnull(com) {
   
	if (com.value != "")
		return true;
	else {
		alert("Enter "+com.id);
		return false;
	}
}

function cbnotnull(chk) {
    
	 flag = false;
	 
	 for(i=0;i<chk.length;i++)
	  {
	   val = chk[i].checked;
	   
	   if(val)
	   flag = true;
	  }
	  
	  if(flag)
	 {	
	  return true;
	 }
	 else
	 {
	  alert("Select atleast one "+chk[0].id);
	  return false;
	 }
}	 
	

function isValidUrl(url) {
url = url.value
regExp = /(^(http\:\/\/|www\.))/;
if((url == '') || (url == null))
	return false;
else { 
	if(regExp.test(url))
		return true;
	else {
		alert("Url should start with either http: or www. ");
	return false;
	}
}
}

 function  validemail(str){

	str = str.value
	if((str == '')||(str == null)){
	  alert("Enter valid email");
	   testresults =  false;
	   
	}else {
	var filter=/^([\w-]+(?:\.[\w-]+)*)@((?:[\w-]+\.)*\w[\w-]{0,66})\.([a-z]{2,6}(?:\.[a-z]{2})?)$/i
		if (filter.test(str))
			testresults=true;
	    else 
		{	  
			alert("Enter valid email");
		testresults=false;
		 
		}
	}
	return (testresults);
}

function IsNumber(sText)

{ 
s = sText;
sText = sText.value;
 if((sText == '')||(sText == null)){
        alert("Enter  "+s.id); 
	   testresults =  false;
	   
	}else{
	 
   var ValidChars = "0123456789.";
   var IsNumber=true;
   var Char;

    
   for (i = 0; i < sText.length && IsNumber == true; i++) 
      { 
      Char = sText.charAt(i); 
      if (ValidChars.indexOf(Char) == -1) 
         {
         alert("Enter  number");
		 IsNumber = false;
         }
      }
   return IsNumber;
   }
   }
   
function IsText(sText)

{ 
 s = sText;
sText = sText.value;
 if((sText == '')||(sText == null)){
  alert("Enter  "+s.id);
	   testresults =  false;
	   
	}else{

   var ValidChars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz.";
   var IsText=true;
   var Char;

 
   for (i = 0; i < sText.length && IsIsText == true; i++) 
      { 
      Char = sText.charAt(i); 
      if (ValidChars.indexOf(Char) == -1) 
         {
			alert("Enter valid text");
		IsText = false;
         }
      }
   return IsText;
     }   
   }