function newImage(arg){if(document.images){rslt=new Image();rslt.src=arg;return rslt;}}
function changeImages(){if(document.images&&(preloadFlag==true)){for(var i=0;i<changeImages.arguments.length;i+=2){document[changeImages.arguments[i]].src=changeImages.arguments[i+1];}}}
var preloadFlag=false;function preloadImages(){if(document.images){h4=newImage("images/h4_l.gif");h5=newImage("images/h5_l.gif");h6=newImage("images/h6_l.gif");h7=newImage("images/h7_l.gif");h9=newImage("images/h9_l.gif");h10=newImage("images/h10_l.gif");h11=newImage("images/h11_l.gif");h12=newImage("images/h12_l.gif");preloadFlag=true;}}