// JavaScript Document
function toggle(id)
{	
	//document.getElementById("home").style.display="none";
	document.getElementById("about").style.display="none";
	document.getElementById("product").style.display="none";
	document.getElementById("video").style.display="none";
	document.getElementById("quote").style.display="none";
	document.getElementById("news").style.display="none";
	document.getElementById("contact").style.display="none";
	 hideall();
	document.getElementById(id).style.display="block";

}
function hideall()
{	
	//document.getElementById("home").style.display="none";
	document.getElementById("about").style.display="none";
	document.getElementById("product").style.display="none";
	document.getElementById("video").style.display="none";
	document.getElementById("quote").style.display="none";
	document.getElementById("news").style.display="none";
	document.getElementById("contact").style.display="none";
}


<!--



function isEmail(Ml)

{

  if(!Ml){return true}

  if(Ml.indexOf("@")<=0 || Ml.indexOf("@")==Ml.length-1 || Ml.indexOf(".")<=0 || Ml.indexOf(".")==Ml.length-1 || Ml.indexOf("..")!=-1 || Ml.indexOf("@@")!=-1 || Ml.indexOf("@.")!=-1 || Ml.indexOf(".@")!=-1)

  {

      return false

  }

  else

  {

      return true

  }

}

	

<!--

function Validcontact1(frm)

{

	var txt="";

	if(!frm.name.value)

	{

		txt+="Please enter your name.\n"

	}



	if(!frm.email.value || !isEmail(frm.email.value))

	{

	   txt+="Please enter a valid email address.\n"

       

 	}



	if(!frm.phone.value)

	{

		txt+="Please enter Phone Number.\n"

	}

	

	

	if(txt)

	{

		alert("These fields are mandatory :\n\n"+ txt +"\n     Please try again.");

		return false

	}

return true	

}



-->

function ValidQuote(register)

{

	if(register.name.value=="")

	{

  		alert("Please enter your name");

  		register.name.focus();

  		return false;

	}

	if(register.email.value=="")

	{

  		alert("Please enter your email address");

  		register.email.focus();

  		return false;

	}

	

	if(register.phone.value=="")

	{

  		alert("Please enter your phone number");

  		register.phone.focus();

  		return false;

	}

	if(register.zip.value=="")

	{

  		alert("Please enter your zip code");

  		register.zip.focus();

  		return false;

	}

	

	
if(register.emp_name.value=="")

	{

  		alert("Please enter the number of employees");

  		register.emp_name.focus();

  		return false;

	}

	



    return true();

}			



<!------------------------------------------------------------------------------------------------------------->


function Validnews1(frm)

{

	var txt="";

	if(!frm.name.value)

	{

		txt+="Please enter your name.\n"

	}



	if(!frm.email.value || !isEmail(frm.email.value))

	{

	   txt+="Enter valid email address.\n"

       

 	}



	
	

	

	if(txt)

	{

		alert("Sorry. You left some mandatory fields :\n\n"+ txt +"\n     Please Check");

		return false

	}

return true	

}
<!----------------------------------------------------->


function check_num(id)

{
	var val=document.getElementById(id).value;
	if(val!="" && isNaN(val))
	 {
		val=val.substring(0,val.length-1);				   
	 }
  document.getElementById(id).value=val;
	


}