// minmax.js: make IE5+/Win support CSS min/max-width/height // version 1.0, 08-Aug-2003 // written by Andrew Clover , use freely /*@cc_on @if (@_win32 && @_jscript_version>4) var minmax_elements; minmax_props = new Array( new Array('min-width', 'minWidth'), new Array('max-width', 'maxWidth'), new Array('min-height', 'minHeight'), new Array('max-height', 'maxHeight') ); // Binding. Called on all new elements. If , initialise; check all // elements for minmax properties function minmax_bind(el) { var i, em, ms; var st = el.style, cs = el.currentStyle; if (minmax_elements == window.undefined) { // initialise when body element has turned up, but only on IE if (!document.body || !document.body.currentStyle) return; minmax_elements = new Array(); window.attachEvent('onresize', minmax_delayout); // make font size listener em = document.createElement('div'); em.setAttribute('id', 'minmax_em'); em.style.position = 'absolute'; em.style.visibility = 'hidden'; em.style.fontSize = 'xx-large'; em.style.height = '5em'; em.style.top = '-5em'; em.style.left = '0'; if (em.style.setExpression) { try { em.style.setExpression('width', 'minmax_checkFont()'); } catch (err) { } document.body.insertBefore(em, document.body.firstChild); } } // transform hyphenated properties the browser has not caught to camelCase for (i = minmax_props.length; i-- > 0; ) if (cs[minmax_props[i][0]]) st[minmax_props[i][1]] = cs[minmax_props[i][0]]; // add element with properties to list, store optimal size values for (i = minmax_props.length; i-- > 0; ) { ms = cs[minmax_props[i][1]]; if (ms && ms != 'auto' && ms != 'none' && ms != '0' && ms != '') { st.minmaxWidth = cs.width; st.minmaxHeight = cs.height; minmax_elements[minmax_elements.length] = el; // will need a layout later minmax_delayout(); break; } } } // check for font size changes var minmax_fontsize = 0; function minmax_checkFont() { var fs = document.getElementById('minmax_em').offsetHeight; if (minmax_fontsize != fs && minmax_fontsize != 0) minmax_delayout(); minmax_fontsize = fs; return '5em'; } // Layout. Called after window and font size-change. Go through elements we // picked out earlier and set their size to the minimum, maximum and optimum, // choosing whichever is appropriate // Request re-layout at next available moment var minmax_delaying = false; function minmax_delayout() { if (minmax_delaying) return; minmax_delaying = true; window.setTimeout(minmax_layout, 0); } function minmax_stopdelaying() { minmax_delaying = false; } function minmax_layout() { window.setTimeout(minmax_stopdelaying, 100); var i, el, st, cs, optimal, inrange; for (i = minmax_elements.length; i-- > 0; ) { el = minmax_elements[i]; st = el.style; cs = el.currentStyle; // horizontal size bounding st.width = st.minmaxWidth; optimal = el.offsetWidth; inrange = true; if (inrange && cs.minWidth && cs.minWidth != '0' && cs.minWidth != 'auto' && cs.minWidth != '') { st.width = cs.minWidth; inrange = (el.offsetWidth < optimal); } if (inrange && cs.maxWidth && cs.maxWidth != 'none' && cs.maxWidth != 'auto' && cs.maxWidth != '') { st.width = cs.maxWidth; inrange = (el.offsetWidth > optimal); } if (inrange) st.width = st.minmaxWidth; // vertical size bounding st.height = st.minmaxHeight; optimal = el.offsetHeight; inrange = true; if (inrange && cs.minHeight && cs.minHeight != '0' && cs.minHeight != 'auto' && cs.minHeight != '') { st.height = cs.minHeight; inrange = (el.offsetHeight < optimal); } if (inrange && cs.maxHeight && cs.maxHeight != 'none' && cs.maxHeight != 'auto' && cs.maxHeight != '') { st.height = cs.maxHeight; inrange = (el.offsetHeight > optimal); } if (inrange) st.height = st.minmaxHeight; } } // Scanning. Check document every so often until it has finished loading. Do // nothing until arrives, then call main init. Pass any new elements // found on each scan to be bound var minmax_SCANDELAY = 500; function minmax_scan() { var el; for (var i = 0; i < document.all.length; i++) { el = document.all[i]; if (!el.minmax_bound) { el.minmax_bound = true; minmax_bind(el); } } } var minmax_scanner; function minmax_stop() { window.clearInterval(minmax_scanner); minmax_scan(); } minmax_scan(); minmax_scanner = window.setInterval(minmax_scan, minmax_SCANDELAY); window.attachEvent('onload', minmax_stop); @end@*/