function ReplaceSrc($new) {
		$len = $this->GetLen(); // avoid PHP error : Strict Standards: Only variables should be passed by reference
		$this->Txt = substr_replace($this->Txt, $new, $this->PosBeg, $len);
		$diff = strlen($new) - $len;
		$this->PosEnd += $diff;
		$this->pST_Src = false;
		if ($new==='') {
			$this->pST_PosBeg = false;
			$this->pST_PosEnd = false;
			$this->pET_PosBeg = false;
		} else {
			$this->pST_PosEnd += $diff; // CAUTION: may be wrong if attributes has changed
			if ($this->pET_PosBeg!==false) $this->pET_PosBeg += $diff; // CAUTION: right only if the tag name is the same
		}
	}