function checkval(chkname1)

{

	var allchkbox=document.forms['formx'].elements[chkname1];

	var countallchkbox = allchkbox.length;

	for(var i = 0; i < countallchkbox; i++)

		{

			if(allchkbox[i].checked == 0)

			document.formx.selall.checked=0;

		}

}	

function checkstate(chkname)

{

	if(document.formx.selall.checked==1)

	{

		checkall("formx",chkname,1);

		

	}

	if(document.formx.selall.checked==0)

	{

		checkall("formx",chkname,0);

	}

}	

function checkstate1(chkname)

{

	

		checkall("formx",chkname,1);

	

}	

function checkall(FormName, FieldName, CheckValue)

{

	if(!document.forms[FormName])

		return;

	var objCheckBoxes = document.forms[FormName].elements[FieldName];

	if(!objCheckBoxes)

		return;

	var countCheckBoxes = objCheckBoxes.length;

	if(!countCheckBoxes)

		objCheckBoxes.checked = CheckValue;

	else

		// set the check value for all check boxes

		for(var i = 0; i < countCheckBoxes; i++)

			objCheckBoxes[i].checked = CheckValue;

}	
function callmsg()

{	

	var pp=confirm("Are you sure that you want to delete ?");



	if (pp)

	{

		alert("Deleted sucessfully");

		return true;		

		

	}

	else

	{

		return false;

	}

}

///////////////////       email validaion ///////



<!--

function echeck(str) {



		var at="@";

		var dot=".";

		var lat=str.indexOf(at);

		var lstr=str.length;

		var ldot=str.indexOf(dot);

		if (str.indexOf(at)==-1){

		   alert("Invalid E-mail ID");

		   return false;

		}



		if (str.indexOf(at)==-1 || str.indexOf(at)==0 || str.indexOf(at)==lstr){

		   alert("Invalid E-mail ID");

		   return false;

		}



		if (str.indexOf(dot)==-1 || str.indexOf(dot)==0 || str.indexOf(dot)==lstr){

		    alert("Invalid E-mail ID");

		    return false;

		}



		 if (str.indexOf(at,(lat+1))!=-1){

		    alert("Invalid E-mail ID");

		    return false;

		 }



		 if (str.substring(lat-1,lat)==dot || str.substring(lat+1,lat+2)==dot){

		    alert("Invalid E-mail ID");

		    return false;

		 }



		 if (str.indexOf(dot,(lat+2))==-1){

		    alert("Invalid E-mail ID");

		    return false;

		 }

		

		 if (str.indexOf(" ")!=-1){

		    alert("Invalid E-mail ID");

		    return false;

		 }



 		 return true;					

	}

	//-->
//// Ajax XML HTTP Object//



function GetXmlHttpObject()

{

	var xmlHttp=null;

	try

	  {

		  // Firefox, Opera 8.0+, Safari

		  xmlHttp=new XMLHttpRequest();

	  }

	catch (e)

	  {

		  // Internet Explorer

		  try

			{

				xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");

			}

		  catch (e)

			{

				xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");

			}

	  }

	return xmlHttp;

}



///// End of Ajax XML HTTP Object////
	

//        end email validation/////



//// Normal Validaion /////
function N_Validate(f,name) {
	if(f.value==""){
			alert("Please Enter "+name);
			f.focus();
			return 0;
	}
	return 1;
}

////// Corporate Register Validation///



function Register()
{
	if((N_Validate(document.form1.fname,'First Name')==0) || (N_Validate(document.form1.email,'Username/Email')==0) || (N_Validate(document.form1.rollno,'Roll Number')==0)|| (N_Validate(document.form1.password,'Password')==0)|| (N_Validate(document.form1.yoj,'Year Of Joining')==0) ){
		return false;
	}
}
function Login_Validate()
{
	if((N_Validate(document.Login_Form.login_name,'email')==0) || (N_Validate(document.Login_Form.login_pass,'password')==0)){
		return false;
	}
	
}
function Review()
{
	if((N_Validate(document.Login_Form.review_name,'Review Name')==0) || (N_Validate(document.Login_Form.review_desc,'Review Description')==0)){
		return false;
	}
	
}

function Suggestions()
{
	if((N_Validate(document.form1.name,'Name')==0) || (N_Validate(document.form1.username,'Email')==0) || (N_Validate(document.form1.suggestion,'Suggestions')==0)){
		return false;
	}
}

function forgot()
{
	if((N_Validate(document.form1.to,'Email')==0)){
		return false;
	}
}
function check(){
	if((N_Validate(document.form.user,'Name')==0) || (N_Validate(document.form.year,'Year of joining')==0)){
		return false;
	}
}