function muestraform(){       
       		document.getElementById("form_enviar").style.display="block";
			document.getElementById("botenv").style.display="none";
			return false;
			}
function ocultaform(){
			document.getElementById("form_enviar").style.display="none";
			document.getElementById("botenv").style.display="inline";
			return false;
			}
function moformul(){	
		var anchors = $$('a.muestraform');
 		for (var i=0; i<anchors.length; i++){
			var anchor = anchors[i];
			$(anchor).onclick=muestraform;		
       	}	
		var anchors = $$('a.ocultaform');
 		for (var i=0; i<anchors.length; i++){
			var anchor = anchors[i];
			$(anchor).onclick=ocultaform;		
       	}
	var navegador = navigator.userAgent.toLowerCase();
	if(impresora=document.getElementById("botprint")){
		if (navegador.indexOf('msie') == -1) {
			impresora.setAttribute('onclick', 'window.print();');
		}
		else{
			impresora.onclick= function(){
				window.print();
			};
		}
		impresora.style.display = "inline";
		impresora.style.marginLeft = "0.8em";
	}		
}
       
Event.observe(window,"load",moformul,false);