function validateBeforeSubmit()
{
  		if(document.getElementById("first_name").value == "")
		{
			alert("You need to indicate your first name");
			return false;
		}
		if(document.getElementById("last_name").value == "")
				{
					alert("You need to indicate your last name");
					return false;
		}
	  	if(document.getElementById("company").value == "")
		{
			alert("You need to indicate the name of your company");
			return false;
		}
		  
		  	if(document.getElementById("telephone").value == "")
		{
			alert("You need to indicate your telephone number");
			return false;
		}
		  	if(document.getElementById("email").value == "")
		{
			alert("You need to indicate your email address");
			return false;
		}
		if(!document.getElementById("email").value.match(/^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$/))
		{
			alert("Your email address does not apear to be complete");
			return false;
		}
		  	if(document.getElementById("question").value == "")
		{
			alert("You need to indicate your comments or your question");
			return false;
		}
		
		//alert(document.frmSendMail.sujet1.checked);
		//alert(document.frmSendMail.sujet2.checked);
		
		if((!(document.forms['frmSendMail'].sujet1.checked)) && (!(document.forms['frmSendMail'].sujet2.checked)) && (!(document.forms['frmSendMail'].sujet3.checked)) && (!(document.forms['frmSendMail'].sujet4.checked)) && (!(document.forms['frmSendMail'].sujet5.checked)) && (!(document.forms['frmSendMail'].sujet6.checked)) && (!(document.forms['frmSendMail'].sujet7.checked)) && (!(document.forms['frmSendMail'].sujet8.checked)) && (!(document.forms['frmSendMail'].sujet9.checked)) && (!(document.forms['frmSendMail'].sujet10.checked)) && (!(document.forms['frmSendMail'].sujet11.checked)))
		{ 
		  	alert("You need to check one at least one of the options");
			return false;
		}
		
		
		//alert(document.frmSendMail.sujet1.checked);
		/*
		if((document.frmSendMail.sujet1.checked) && (document.frmSendMail.sujet2.checked) && (document.frmSendMail.sujet3.checked) && (document.frmSendMail.sujet4.checked = false) && (document.frmSendMail.sujet5.checked = false) && (document.frmSendMail.sujet6.checked = false) && (document.frmSendMail.sujet7.checked = false))
		{ 
		    
			alert("You need to check one at least one of the options");
			return false;
		}
		*/
		
		if(document.getElementById("decouverte").value == "")
		{
			alert("You need to indicate how did you find about our site");
			return false;
		}
		
 }