function checkFloat(s)
		{
			if(!s.length)return false;
			pont=0;
			for(j=0;j<s.length;j++)
				{
					c=s.charCodeAt(j);
					if((c==46)||(c>47&&c<58)){}else return false;
					if(c==46)pont++;
				}
			if(pont>1)return false;

			return true;
		}
		
		function EngedTilt(obj, lab, t1, t2, t3, t4, t5, t6)
		 {
			 if(!obj.checked)
				 {
					 var x = document.getElementById(lab);
						x.style.color='#a0a0a0';
						var x = document.getElementById('avansform');
						for(i=0;i<x.elements.length;i++) if((x.elements[i].name == t1 || x.elements[i].name == t2 || x.elements[i].name == t3 || x.elements[i].name == t4 || x.elements[i].name == t5 || x.elements[i].name == t6)  && x.elements[i].name.length) x.elements[i].disabled=true;
					}
					else
					{
					 var x = document.getElementById(lab);
						x.style.color='';
						var x = document.getElementById('avansform');
						for(i=0;i<x.elements.length;i++) if((x.elements[i].name == t1 || x.elements[i].name == t2 || x.elements[i].name == t3 || x.elements[i].name == t4 || x.elements[i].name == t5 || x.elements[i].name == t6) && x.elements[i].name.length ) x.elements[i].disabled=false;
					}
			}