code = code.replace(/\r\n/g, '\r\t')

r.findText(code)

r.select()

}else{

sel.text = '\t'

sel.select()

}

break

case (13) :

tmp = sel.duplicate()

tmp.moveToPoint(r.getBoundingClientRect().left, sel.getClientRects()[0].top)

// 出错检验代码~~~~~~

if(sel.parentElement() != tmp.parentElement()) return;

tmp.setEndPoint('endToEnd', sel)

for (var i=0; tmp.text.match(/^[\t]+/g) && i<tmp.text.match(/^[\t]+/g)[0].length; i++) tabs += '\t'

sel.text = '\r\n'+tabs

sel.select()

break

default :

event.returnValue = true

break;

}

return;

}

function runcode() {

var str = document.getElementById('txt_main').value;

var code_win = window.open('about:blank');

code_win.document.open();

code_win.document.writeln('<script>');

code_win.