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| <div id="container" style="position:relative;">
<img id="mon_image" src="IMG_0430.jpg" width="800" height="700" />
</div>
<script language="JavaScript" type="text/JavaScript">
window.onload=function() {
activate('mon_image');
};
function activate(id) {
var el = document.getElementById(id),
oX, oY, down = false,
div, s;
el.onmousedown = function(e) {
oX = offset_X(el,e);
oY = offset_Y(el,e);
down = true;
div = document.createElement('div');
s = div.style;
s.display = 'none';
s.position = 'absolute';
s.left = oX+'px';
s.top = oY+'px';
s.border = '2px solid #666666';
s.background='rgba(150,150,256,0.3)';
this.parentNode.appendChild(div);
if(e.preventDefault) { e.preventDefault(); }
else { e.returnValue = false; }
return false;
};
document.body.onmousemove = function(e) {
if(down) {
var newX = offset_X(el,e),
newY = offset_Y(el,e);
s.display = '';
if(newX<oX) { s.left = newX+'px'; }
if(newY<oY) { s.top = newY+'px'; }
s.width = Math.abs(newX-oX)+'px';
s.height = Math.abs(newY-oY)+'px';
}
};
document.body.onmouseup = function(e) {
if(down) {
var newX = offset_X(el,e),
newY = offset_Y(el,e);
s.display = '';
if(newX<oX) { s.left = newX+'px'; }
if(newY<oY) { s.top = newY+'px'; }
s.width = Math.abs(newX-oX)+'px';
s.height = Math.abs(newY-oY)+'px';
alert('Départ : ('+oX+','+oY+')\nArrivée : ('+newX+','+newY+')');
}
down = false;
}
}
function offset_X(el,event){
if(event.offsetX) return event.offsetX;
var ox = -el.offsetLeft;
while(el=el.offsetParent){ ox += el.scrollLeft - el.offsetLeft; }
return event.clientX + ox;
}
function offset_Y(el,event){
if(event.offsetY) return event.offsetY;
var oy = -el.offsetTop;
while(el=el.offsetParent){ oy += el.scrollTop - el.offsetTop; }
return event.clientY + oy;
}
</script> |
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