function openImage(url) { // preload image so we have dimensions myImage = new Image(); myImage.src = url; myImage.onLoad = openWin(myImage, url) } function openWin(myImage, url) { winWidth = myImage.width; winHeight = myImage.height; // open window myNewWin = window.open('', '', 'resizable=no,width=500,height=641,screenX=0,screenY=400,top=0,left=0'); myDoc = myNewWin.document; myDoc.write(""); myDoc.write("

"); myDoc.write(""); } function swap_image(img,capt) { //alert(capt.value); //alert(document.forms[0].main_pic_caption.value); document.main_pic.src = img; document.forms[0].main_pic_caption.value = capt; //alert(document.forms[0].main_pic_caption.value); }