/* by Giorgio */
var char_rem = 0;
function cleanNode(oNode, left) {
if (oNode.nodeType == 3) {
// lascio il nodo di testo cosė come č solo se non viene superato il numero di caratteri
if (char_rem - oNode.nodeValue.length > 0) {
char_rem = char_rem - oNode.nodeValue.length;
} else if (left == null || left) {
var next_space = oNode.nodeValue.indexOf(" ", char_rem);
if (next_space < char_rem)
next_space = char_rem;
oNode.nodeValue = oNode.nodeValue.substring(0, next_space);
char_rem = 0;
} else {
var next_space = oNode.nodeValue.indexOf(" ", oNode.nodeValue.length - char_rem);
if (next_space < 0)
next_space = oNode.nodeValue.length - char_rem;
else
next_space++;
oNode.nodeValue = oNode.nodeValue.substring(next_space, oNode.nodeValue.length);
char_rem = 0;
}
} else if (oNode.hasChildNodes()) {
var i = 0;
if (left == null || left) {
for (i=0; i<oNode.childNodes.length; i++){
if (char_rem > 0) {
cleanNode(oNode.childNodes[i], left);
} else {
break;
}
}
if (i < oNode.childNodes.length) {
while(oNode.childNodes[i] != null) oNode.removeChild(oNode.childNodes[i]);
}
} else {
for (i = oNode.childNodes.length-1; i >= 0; i--){
if (char_rem > 0) {
cleanNode(oNode.childNodes[i], left);
} else {
break;
}
}
while (i >= 0) {
if (oNode.childNodes[i] != null) 
oNode.removeChild(oNode.childNodes[i]);
i--;
}
}
} 
}
function trimHTML(HTML_string, num_char, left) {
if  ( (HTML_string == null) || (num_char == null) || (HTML_string.length < num_char) ) return HTML_string;
char_rem = num_char;
var oDivExt = document.createElement('DIV');
oDivExt.innerHTML = HTML_string;
cleanNode(oDivExt, left);
return oDivExt.innerHTML;
}
function char_counter(node) {
var ret = 0;
if (node.nodeType == 3) {
ret = ret + node.nodeValue.length;
} else if (node.hasChildNodes()) {
var i = 0;
for (i=0; i < node.childNodes.length; i++){
ret = ret + char_counter(node.childNodes[i]);
}
}
return ret;
}
function dividiContenuto(div1, div2, seek) {
var oDiv1 = document.getElementById(div1);
var oDiv2 = document.getElementById(div2);
var contenuto = oDiv1.innerHTML;
if (oDiv1 != null && oDiv2 != null) {
oDiv1.innerHTML = trimHTML(contenuto, char_counter(oDiv1) - seek);
oDiv2.innerHTML = trimHTML(contenuto, seek, false);
}
}