function checkAvailableWidth(){
var container = document.getElementById('bottom-area');
container.style.top = document.body.scrollHeight;
//container.className = 'isShow';
}
function subform() {
 document.forms[0].submit();
}

function imageshow(obj) {

 document.getElementById(obj+'a').className = 'imagehide';
 document.getElementById(obj+'b').className = 'imageshow';
}

function imagehide(obj) {

 document.getElementById(obj+'a').className = 'imageshow';
 document.getElementById(obj+'b').className = 'imagehide';

}