var b;
var altura;

function alertSize() {
  var myHeight = 0;
	var alturaDest = 0;
	var nueva_altura=0;
	var val=0;
  if( typeof( window.document.height ) == "number" ) {
    //Non-IE
      myHeight = document.body.scrollHeight;
      alturaDest = document.getElementById("dest").offsetHeight;
      val=205;
      nueva_altura= myHeight-val;
      //alert(myHeight +'-'+val+'-'+alturaDest+'='+nueva_altura);
      
      if (nueva_altura > 0) {
      
      
      	 if (document.getElementById('bordeDer')!=null ) {
      	 		
			 	document.getElementById('bordeDer').style.height=nueva_altura;
			
	 }
	 if (document.getElementById('bordeIzq')!=null ) {
	 	document.getElementById('bordeIzq').style.height=nueva_altura;
	 }
      	//alert(document.getElementById("dest").height);
      	//alert('Fet');
      }
  } else if( document.documentElement && document.documentElement.clientHeight ) {
    //IE 6+ in 'standards compliant mode'
      myHeight = document.documentElement.clientHeight;
      document.getElementById('dest').height=myHeight-585;
      document.getElementById('dest').bgColor="#E0D5B4";
  }else if( document.body && document.body.clientHeight ) {
      	//IE 4 compatible
      	myHeight = document.body.scrollHeight;
	val=235;
	nueva_altura= myHeight-val;
	if (nueva_altura > 0) {
		
			 if (document.getElementById('bordeDer')!=null ) {
			 	document.getElementById('bordeDer').height=nueva_altura;
			 }
			 if (document.getElementById('bordeIzq')!=null ) {
			 	document.getElementById('bordeIzq').height=nueva_altura;
			 }
	}
  }
}