function GridCheckAll(form){
				formulario=form;
				if(formulario.GridChecked.value==0){
					for(i=0;i<formulario.length;i++){
						if(formulario.elements[i].type=="checkbox" && formulario.elements[i].name!="todas"){
							if(formulario.elements[i].checked==false){
								formulario.elements[i].checked=true;
							}
						}
					}
					formulario.GridChecked.value = 1;
				} else {
					for(i=0;i<formulario.length;i++){
						if(formulario.elements[i].type=="checkbox" && formulario.elements[i].name!="todas"){
							if(formulario.elements[i].checked==true){
								formulario.elements[i].checked=false;
							}
						}
					}
				  formulario.GridChecked.value = 0;
				}
			}

function phpGridOpenNewWindow(URLtoOpen, windowName, windowFeatures) 
{ 
 newWindow=window.open(URLtoOpen, windowName, windowFeatures); 
 LeftPosition = 0; 
 TopPosition = 0;  
 
}